Estimate your 2026 federal income tax, refund or amount owed, with the standard deduction, child tax credit, and your marginal and effective tax rate.
The child tax credit falls by 50 for every 1,000 of income above 200,000 (400,000 married filing jointly).
$16,100 for single filers, $32,200 for married couples filing jointly and $24,150 for heads of household.
Your marginal rate is the bracket your last dollar falls in. Your effective rate is your total tax divided by your total income, which is always lower.
$2,200 per qualifying child under 17. If the credit is more than your tax, up to $1,700 per child can be refunded, based on 15% of earned income above $2,500.